Strength testing machine for composite material film

Abstract

The utility model relates to a composite material film strength testing machine, which comprises a workbench provided with an electric control device, the fixing support is located on the workbench, and a film fixing clamp is arranged on the fixing support; the movable support is arranged on the workbench, and a detection distance is formed between the movable support and the fixed support; the detection assembly is arranged on the movable support and comprises a detection fixed plate, a detection movable plate movably connected with the detection fixed plate through a first buffer mechanism, a pressure sensor fixed to the front end of the detection movable plate, a contact rubber strip fixed to the pressure sensor and a detection movable threaded rod. One end of the detection movable threaded rod is fixedly connected with the detection movable plate, the other end is provided with a rotating handle, and the detection movable threaded rod is in threaded connection with the detection fixed plate; the rotating handle is operated so that the pressure sensor and the contact adhesive tape approach or move away from the film fixing clamp. The device realizes the function of detecting the front surface strength of the composite material film.

Description

Technical Field

[0001] The utility model relates to the production and detection technology of composite material films, in particular to a strength testing machine for composite material films. Background Art

[0002] There are various types of composite material films, mainly including composite membranes, composite packaging materials, plastic packaging films, novel flexible carbon nanotube films, and special functional membrane materials. For example: Composite membranes: These membranes are usually composed of two or more materials combined together and are used in separation processes such as reverse osmosis, gas separation, and pervaporation. They can be flat membranes or spiral wound membranes, and non-woven fabrics are used to reinforce to support the pressure resistance of the microporous membrane. Hollow fiber membranes do not require additional reinforcing materials. Composite packaging materials: These materials are combined through one or more composite processes and usually include a base layer, a functional layer, and a heat-sealing layer. The base layer is mainly used for aesthetics, printing, moisture resistance, etc., while the functional layer is responsible for functions such as barrier and light shielding, and the heat-sealing layer is in direct contact with the packaged item, providing functions such as adaptability, impermeability, and good heat-sealing performance. Plastic packaging films: Include PVA-coated high-barrier films and biaxially oriented polypropylene films (BOPP). PVA-coated high-barrier films are coated with PVA added with nano-inorganic substances on polyethylene films to provide high-barrier performance, while BOPP is widely used in the printing and packaging fields due to its excellent physical stability, mechanical strength, airtightness, etc. Novel flexible carbon nanotube films: This kind of film has a large-area Y-shaped interconnected network structure, providing efficient conductive paths and tough mechanical properties, which are the key factors for high-performance recombinant carbon nanotube films. Special functional membrane materials: Such as polyimide (PI) films, due to their excellent high-temperature resistance, mechanical properties, and chemical stability, have become the first choice for flexible substrate materials. PI films are widely used in multiple fields such as aviation, aerospace, machinery, and electricity, and are one of the best current flexible substrate materials. Building films: This is a multi-layer functionalized polyester composite film material used to improve the performance of building glass, such as heat insulation, energy conservation, and ultraviolet protection.

[0003] A composite material film is a film structure made by laminating or compounding two or more materials. Such films are common in many industrial and consumer applications and have various excellent properties and characteristics. For example: mechanical property testing, thermal property testing, chemical property testing, optical property testing, electrical property testing, environmental adaptability testing, etc.

[0004] Strength detection is a category of mechanical property testing for composite material films.

[0005] Example of the prior art. Refer to the patent document CN218036045U, specifically a plastic film tear strength testing device, which includes a base, a movable component, and a fixing unit; a connecting block is provided at the top of the base, the movable component is fixedly connected to the top of the base through the connecting block, the fixing unit is located inside the movable component, the movable component includes a bidirectional screw, a motor, a fixing plate, and a hinge, one end of the bidirectional screw is rotatably connected to the top of the inner wall of the connecting block, the other end of the bidirectional screw is provided with a bevel gear, the top of the bevel gear is rotatably connected to the bottom of the bidirectional screw, the output end of the motor penetrates the inner wall of the connecting block and is rotatably connected to the outside of the bevel gear, two groups of fixing plates are provided, and nuts are fixedly connected to one end of each of the two fixing plates. This device makes the detection of the tear strength of the plastic film simpler and the detection record more convenient. The patent technology mainly tests the tear strength of the plastic film. When detecting, the force on the plastic film comes from the side, causing the plastic film to expand outwards.

[0006] However, in actual use scenarios, the film is prone to being impacted from the front. Therefore, for its strength test, it is necessary to take into account the performance test under positive pressure, which is an obvious shortcoming in the existing test technology and urgently needs to be improved. Summary of the Invention

[0007] In order to overcome the above-mentioned deficiencies of the prior art, the present utility model provides a composite material film strength testing machine.

[0008] The technical solution for the present utility model to solve its technical problems is: a composite material film strength testing machine, including:

[0009] A workbench, which is provided with an electric control device for controlling connection with various electrical components;

[0010] A fixed bracket, which is located on the workbench, and a film fixing clamp is provided on the fixed bracket;

[0011] A movable bracket, which is provided on the workbench, and a detection spacing is formed between the movable bracket and the fixed bracket;

[0012] A detection component, which is provided on the movable bracket, and the detection component includes a detection fixing plate, a detection movable plate movably connected to the detection fixing plate through a first buffer mechanism, a pressure sensor fixed to the front end of the detection movable plate, a contact rubber strip fixed to the pressure sensor, and a detection moving threaded rod. One end of the detection moving threaded rod is fixedly connected to the detection movable plate, the other end is provided with a rotating handle, and the detection moving threaded rod is threadedly connected to the detection fixing plate;

[0013] Operate the rotating handle to make the pressure sensor and the contact rubber strip approach or move away from the film fixing clamp.

[0014] In some preferred embodiments of the present utility model, the film fixing fixture includes 4 fasteners, and the 4 fasteners form a rectangular area, and the pressure sensor and the contact rubber strip can enter the range of the rectangular area.

[0015] In some preferred embodiments of the present utility model, a second buffer mechanism is provided at the lower end of the fixing bracket.

[0016] Further, the first buffer mechanism is arranged in the horizontal direction, and the second buffer mechanism is arranged in the vertical direction;

[0017] Both the first buffer mechanism and the second buffer mechanism include a telescopic guide post, a column sleeve sleeved on the telescopic guide post, and a buffer spring. A disc portion extends from the end of the telescopic guide post to the peripheral side, and the buffer spring abuts between the disc portion and the column sleeve;

[0018] The column sleeve in the first buffer mechanism is fixed on the detection fixing plate, and the column sleeve in the second buffer mechanism is fixed on the workbench.

[0019] In some preferred embodiments of the present utility model, a height adjustment mechanism is further included, which acts on the fixing bracket so that the fixing bracket can be adjusted in height relative to the movable bracket.

[0020] Specifically, the height adjustment mechanism includes a driving motor, a driving shaft, a transmission belt drivingly connected between the driving motor and the driving shaft, a support seat provided at the lower end of the fixing bracket, and an adjustment cam rotatably connected to the support seat. The adjustment cam forms a transmission cooperation with the driving shaft.

[0021] Furthermore, a first tooth-shaped structure is provided on the outer periphery of the adjustment cam, a second tooth-shaped structure is provided on the outer periphery of the driving shaft, and the first tooth-shaped structure meshes with the second tooth-shaped structure.

[0022] In some preferred embodiments of the present utility model, a distance sensor is provided on the detection fixing plate, and the distance sensor faces the film fixing fixture.

[0023] In some preferred embodiments of the present utility model, a transparent object detection sensor is provided on the detection fixing plate, and the transparent object detection sensor faces the film fixing fixture.

[0024] In some preferred embodiments of the present utility model, the pressure sensor is connected to the contact rubber strip through an expansion buckle;

[0025] A connecting groove is formed in the pressure sensor, and the inner end of the expansion buckle extends into the connecting groove and abuts against the inner wall of the connecting groove, so that the expansion buckle and the pressure sensor form a limit and anti - detachment fit;

[0026] The outer end of the expansion buckle is a contact end. A clamping groove is formed in the contact rubber strip, and the contact end is embedded into the interior of the contact rubber strip through the clamping groove.

[0027] The beneficial effects of the utility model are as follows:

[0028] First, the function of detecting the front - side strength of the composite material film is realized. The contact rubber strip first contacts the composite material film at a front - side angle. During the contact process, mutual acting forces are continuously applied between the contact rubber strip and the composite plastic film, and the contact rubber strip transmits the force to the pressure sensor at the rear. As the contact distance changes, the pressure value detected by the pressure sensor continuously changes. Then, the pressure sensor feeds back the force to the electronic control device, so as to obtain the front - side strength value of the composite material film being detected at present.

[0029] Second, when the composite material film is damaged under pressure, the detection stops and the maximum pressure value is obtained. The detection is repeated multiple times and the average value is taken as the average front - side strength value of the composite material film to show the strength performance of the composite material film. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the utility model.

[0031] Figure 2 is a front view of the utility model.

[0032] Figure 3 is a partial structural schematic diagram of the utility model.

[0033] Figure 4 is a top view of the utility model.

[0034] Figure 5 is Figure 4 an enlarged schematic diagram of part A in

[0035] Figure 6 a schematic structural diagram of the height - adjusting mechanism.

[0036] Figure 7 is a schematic principle diagram of the drive shaft and the adjusting cam.

[0037] Figure 8 is a schematic diagram of the film fixing fixture.

[0038] Figure 9 is a schematic structural diagram of the first buffer mechanism (second buffer mechanism).

[0039] In the figure: 1. Workbench; 11. Electric control device; 2. Fixed bracket; 21. Film fixing clamp; 211. Fastener; 212. Rectangular area; 3. Movable bracket; 3d. Detection spacing; 4. Detection assembly; 41. Detection fixed plate; 42. Detection movable plate; 43. Pressure sensor; 431. Expansion buckle; 4311. Contact end; 432. Connection groove; 44. Contact rubber strip; 441. Card slot; 45. Moving threaded rod; 46. Rotating handle; 5. First buffer mechanism; 51. Telescopic guide post; 511. Disc part; 52. Column sleeve; 53. Buffer spring; 6. Second buffer mechanism; 7. Height adjustment mechanism; 71. Driving motor; 72. Driving shaft; 721. Second tooth-shaped structure; 73. Transmission belt; 74. Support seat; 75. Adjusting cam; 751. First tooth-shaped structure; 81. Distance sensor; 82. Transparent object detection sensor; 9. Composite material film. Detailed implementation mode

[0040] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific descriptions of the present utility model, and their purpose is to enable those skilled in the art to better understand the technical solutions of the present utility model, and should not be regarded as a limitation of the present utility model.

[0041] In the description of the present utility model, it should be noted that, as terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0042] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, as terms such as "installation", "connection", "connection" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art of the present utility model, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0043] Embodiment 1

[0044] Refer to Figures 1 to 9 , a composite material film strength tester, including:

[0045] A workbench 1, which is provided with an electric control device 11, and the electric control device 11 is used for controlling connection with each electrical component;

[0046] A fixed bracket 2, which is located on the workbench 1, and a film fixing clamp 21 is arranged on the fixed bracket 2;

[0047] A movable bracket 3, which is arranged on the workbench 1, and a detection spacing 3d is formed between the movable bracket 3 and the fixed bracket 2;

[0048] A detection assembly 4, which is arranged on the movable bracket 3, and the detection assembly 4 includes a detection fixed plate 41, a detection movable plate 42 movably connected to the detection fixed plate 41 through a first buffer mechanism 5, a pressure sensor 43 fixed at the front end of the detection movable plate 42, a contact rubber strip 44 fixed on the pressure sensor 43, and a detection moving threaded rod 45. One end of the detection moving threaded rod 45 is fixedly connected to the detection movable plate 42, the other end is provided with a rotating handle 46, and the detection moving threaded rod 45 is threadedly connected to the detection fixed plate 41.

[0049] The above content is the basic structural scheme of the present utility model, and its working principle is as follows: The tester assembles the composite material film 9 to be detected onto the film fixing clamp 21, and then operates the rotating handle 46 to drive the detection movable plate 42 to move forward, so that the pressure sensor 43 and the contact rubber strip 44 approach the film fixing clamp 21. Then, the contact rubber strip 44 first contacts the composite material film 9 at a positive angle. During the contact process, mutual acting forces are continuously applied between the contact rubber strip 44 and the composite plastic film, and the contact rubber strip 44 transmits the force to the pressure sensor 43 at the rear. As the contact distance changes, the pressure value detected by the pressure sensor 43 continuously changes. Then, the pressure sensor 43 feeds back the force to the electronic control device 11, so as to obtain the positive strength value of the composite material film 9 being detected at present. Optionally, when the composite material film 9 is damaged under pressure, the detection stops and the maximum pressure value is obtained. The detection is repeated multiple times and the average value is taken as the average positive strength value of the composite material film 9 to show the strength performance of the composite material film 9.

[0050] Refer to Figure 8 , in some preferred embodiments of the present utility model, the film fixing clamp 21 includes 4 fasteners 211, and the 4 fasteners 211 form a regular rectangular area 212 to control the shape variable of the composite material film 9 during the test process; and, the pressure sensor 43 and the contact rubber strip 44 can enter the range of the rectangular area 212 to ensure that the contact rubber strip 44 and the composite material film 9 can contact and generate mutual acting forces.

[0051] The preferred cooperation structure of the pressure sensor 43 and the contact rubber strip 44 is: Refer to Figures 4 to 5, the pressure sensor 43 is connected to the contact rubber strip 44 through an expansion buckle 431; a connection groove 432 is formed on the pressure sensor 43, and the inner end of the expansion buckle 431 extends into the connection groove 432 and abuts against the inner wall of the connection groove 432, so that the expansion buckle 431 and the pressure sensor 43 form a limit and anti - detachment fit; the outer end of the expansion buckle 431 is a contact end 4311, and a card slot 441 is formed on the contact rubber strip 44, and the contact end 4311 is embedded into the interior of the contact rubber strip 44 through the card slot 441.

[0052] Embodiment Two

[0053] Since the strength of the composite material film 9 is unknown, it is prone to be damaged before obtaining the test results during the test, resulting in test failure. To eliminate the above - mentioned defect, on the basis of the structure of Embodiment One, a force - unloading and buffering scheme is added. Refer to Figure 3 , Figure 9 , specifically as follows:

[0054] I. The first buffer mechanism 5 is movably connected between the detection fixed plate 41 and the detection movable plate 42.

[0055] II. The second buffer mechanism 6 is arranged at the lower end of the fixed bracket 2.

[0056] Furthermore, the first buffer mechanism 5 is arranged in the horizontal direction, and the second buffer mechanism 6 is arranged in the vertical direction; the column sleeve 52 in the first buffer mechanism 5 is fixed on the detection fixed plate 41, and the column sleeve 52 in the second buffer mechanism 6 is fixed on the workbench 1.

[0057] The specific structural composition is as follows: both the first buffer mechanism 5 and the second buffer mechanism 6 include a telescopic guide post 51, a column sleeve 52 sleeved on the telescopic guide post 51, and a buffer spring 53. A disc portion 511 is formed by the end of the telescopic guide post 51 extending towards the circumferential side, and the buffer spring 53 abuts between the disc portion 511 and the column sleeve 52; the telescopic guide post 51 can transmit pressure. When the instantaneous pressure is too large, the buffer spring 53 is compressed and contracted to resist the instantaneous pressure, thus playing a buffering role, greatly reducing the sudden breakage of the composite material film 9, and enabling the detection to proceed more smoothly.

[0058] Embodiment Three

[0059] In this embodiment, refer to Figure 6, further comprising a height adjustment mechanism 7 which acts on the fixed bracket 2 to enable the fixed bracket 2 to adjust its height relative to the movable bracket 3. Specifically, the height adjustment mechanism 7 includes a drive motor 71, a drive shaft 72, a transmission belt 73 drivingly connected between the drive motor 71 and the drive shaft 72, a support seat 74 provided at the lower end of the fixed bracket 2, and an adjustment cam 75 rotatably connected to the support seat 74. The adjustment cam 75 is in driving cooperation with the drive shaft 72.

[0060] When the drive motor 71 is started, it drives the drive shaft 72 to rotate through the transmission belt 73. The drive shaft 72 drives the adjustment cam 75 to rotate. By virtue of the structural characteristics (cam pair) of the irregular surface of the adjustment cam 75, the fixed bracket 2 is lifted or lowered.

[0061] In order to achieve more stable transmission, a first tooth-shaped structure 751 is provided on the outer periphery of the adjustment cam 75, and a second tooth-shaped structure 721 is provided on the outer periphery of the drive shaft 72. The first tooth-shaped structure 751 and the second tooth-shaped structure 721 are meshed with each other to prevent problems such as slipping and disengagement during the transmission process.

[0062] Embodiment 4

[0063] Referring to Figure 3 , in some preferred embodiments of the present invention, a distance sensor 81 is provided on the detection fixing plate 41, and the distance sensor 81 faces the film fixing fixture 21. The distance sensor 81 can detect the change in distance during the detection process and is used as one of the parameters for calculating the strength of the composite material film 9.

[0064] In some preferred embodiments of the present invention, a transparent object detection sensor 82 is provided on the detection fixing plate 41, and the transparent object detection sensor 82 faces the film fixing fixture 21. Preferably, the transparent object detection sensor 82 adopts a transparent object glass film detection sensor G3-A100P. This type of sensor is particularly suitable for detecting semi-transparent and transparent materials. Whether it is a deformable transparent film or a non-deformable transparent material, it can effectively detect. Its application range is wide, including but not limited to transparent glass detection, film detection (including shaking films), mineral water bottle detection (including liquid shaking) and other transparent detection occasions. Only when the transparent object detection sensor 82 detects that the film fixing fixture 21 is already equipped with the composite material film 9, the electric control device 11 is powered on and can operate normally; if the composite material film 9 is not detected, the electric control device 11 is powered off to prevent mis-starting.

[0065] It should be noted that other technical solutions of the present invention belong to the prior art and will not be elaborated here.

[0066] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as within the protection scope of the present utility model.

Claims

1. A composite material membrane strength testing machine, characterized in that: Included are: A workbench (1) is provided with an electric control device (11), and the electric control device (11) is used for controlling and connecting with various electrical components; A fixed support (2), which is located on the workbench (1), and a film fixing fixture (21) is provided on the fixed support (2); A movable bracket (3) is arranged on the workbench (1), and a detection distance (3d) is formed between the movable bracket (3) and the fixed bracket (2); A detection assembly (4) is arranged on the movable bracket (3), the detection assembly (4) comprising a detection fixed plate (41), a detection movable plate (42) movably connected to the detection fixed plate (41) through a first buffer mechanism (5), a pressure sensor (43) fixed to the front end of the detection movable plate (42), a contact rubber strip (44) fixed to the pressure sensor (43), and a detection movable threaded rod (45), one end of the detection movable threaded rod (45) is fixedly connected to the detection movable plate (42), and the other end is provided with a rotating handle (46), and the detection movable threaded rod (45) is threadedly connected to the detection fixed plate (41); The rotating handle (46) is operated to move the pressure sensor (43) and the contact rubber strip (44) closer to or farther away from the membrane fixing fixture (21).

2. The composite material membrane strength testing machine according to claim 1, characterized in that: The membrane fixing fixture (21) comprises four fasteners (211), and the four fasteners (211) are combined to form a rectangular area (212), and the pressure sensor (43) and the contact rubber strip (44) can enter the range of the rectangular area (212).

3. The composite material membrane strength testing machine according to claim 1, characterized in that: A second buffer mechanism (6) is provided at the lower end of the fixed bracket (2).

4. The composite material membrane strength testing machine according to claim 3, characterized in that: The first buffer mechanism (5) is arranged in the horizontal direction, and the second buffer mechanism (6) is arranged in the vertical direction; The first buffer mechanism (5) and the second buffer mechanism (6) both comprise a telescopic guide column (51), a column sleeve (52) sleeved on the telescopic guide column (51), and a buffer spring (53); the end of the telescopic guide column (51) extends toward the circumference to form a disc portion (511); and the buffer spring (53) abuts between the disc portion (511) and the column sleeve (52); The column sleeve (52) in the first buffer mechanism (5) is fixed on the detection fixing plate (41), and the column sleeve (52) in the second buffer mechanism (6) is fixed on the workbench (1).

5. The composite material membrane strength testing machine according to claim 4, characterized in that: It also includes a height adjustment mechanism (7) which acts on the fixed bracket (2) so that the fixed bracket (2) can be adjusted in height relative to the movable bracket (3).

6. The composite material membrane strength testing machine according to claim 5, characterized in that: The height adjustment mechanism (7) comprises a driving motor (71), a driving shaft (72), a transmission belt (73) connected between the driving motor (71) and the driving shaft (72), a support seat (74) arranged at the lower end of the fixed bracket (2), and an adjustment cam (75) rotatably connected to the support seat (74), wherein the adjustment cam (75) forms a transmission match with the driving shaft (72).

7. The composite material membrane strength testing machine according to claim 6, characterized in that: The outer periphery of the adjusting cam (75) is provided with a first tooth-shaped structure (751), and the outer periphery of the driving shaft (72) is provided with a second tooth-shaped structure (721), and the first tooth-shaped structure (751) and the second tooth-shaped structure (721) are meshed with each other.

8. The composite material membrane strength testing machine according to claim 1, characterized in that: The detection fixing plate (41) is provided with a distance sensor (81), and the distance sensor (81) is directly facing the film fixing fixture (21).

9. The composite material membrane strength testing machine according to claim 1, characterized in that: The detection fixing plate (41) is provided with a transparent object detection sensor (82), and the transparent object detection sensor (82) is directly facing the film fixing fixture (21).

10. The composite material membrane strength testing machine according to claim 1, characterized in that: The pressure sensor (43) is connected to the contact rubber strip (44) via an expansion buckle (431); The pressure sensor (43) is provided with a connection groove (432), and the inner end of the expansion buckle (431) extends into the connection groove (432) and abuts against the inner wall of the connection groove (432), so that the expansion buckle (431) and the pressure sensor (43) form a position-limiting and anti-detachment fit; The outer end of the expansion buckle (431) is a contact end (4311), and a slot (441) is formed on the contact rubber strip (44), and the contact end (4311) is embedded into the interior of the contact rubber strip (44) through the slot (441).

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